Wrench



H. L. DICKSON.

WRENCH.

APPL'HZATJON-Y F'ILE'D APR. 8, 1920.

Patented Aug. 3, 1920.

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Specification of Letters Patent.

Patented Aug. 3, 19526.

Application filed Am 8. 192:). Serial No. 372.207.

To all whom it may concern Be it known that I, Hermon LjDicnson, a citizen of the United States, residing at Toronto, in the county of York and Province of Ontario, Canada, have invented certain new and useful Improvements in Wrenches, of which the following isa specification.

This invention relates to certain new and useful improvements in a wrench particu larly of the pipe wrench type and it has for its primary objects to provide a simple, quicleacting tool which will be efficient in operation and expeditiously adjustable; 2nd, a wrench having a movable inner jaw under the control of the wrench handle for movement thereby into firm gripping relation with the embraced object and without the presence of lost motion; 3rd, a wrench having a jaw quickly adjustable which may be set directly against the object and then secured in this position by manipulation of an adjusting nut; 1th, an improved spring for holding the outer jaw in -a yieldable manner. a

The invention further resides and consists in the arrangements and combinations of parts hereinafter described and claimed, reference being had to the accompanying drawing wherein- Figure 1 is a side elevation of the improved wrench;

Fig. 2 is a front elevation thereof;

Fig. 3 is a transverse section on line 3-3 of Fig. 1; and

Fig. 4 is an elevation of the spring incorporated in the wrench construction.

Referring more in detail to the drawings, numeral 1 designates the wrench handle which is pivoted by pin 2 in a carrier or head 3, the latter also having an inner jaw 4; pivoted therein on pin 5. A cooperating outer jaw 6 has its threaded shank 7 slidable through the carrier 3, being partitioned from the handle by a transverse wall8 integral with the carrier. An adjusting nut 9 is engaged on the protruding free end of the threaded shank and is designed to bear on the inner or adjacent edge 10 of the carrier.

In practice, to set the wide opening jaws on an object the latter is embraced and then the outer jaw pushed or slid thereagainst subsequent to which the nut 9 is turned up against its hearing or seat 10. Now as the wrench is turned the pressure on handle 1 swings the latter on its pivot 52 to exert an outward pressure on the pivoted inner jaw 4: by reason of the eccentric camend 11 of the handle bearing on the face 12 of the inner jaw at a spaced distance from its pivot 5. Obviously, swingingthe handle on its pivot will force-the aw 4: outwardly into firm gripping relation with the embraced object. This hinged mounting of the-inner jaw prevents the wrench from slipping, does away entirely with lost motion and lacks any rolling movement thereby obviating the jamming of the pipe or other gripped object. I

By reason of the disposition of the looking or adjusting nut rearwardly of the carrier frame the slidable jaw is quickly set to embrace the object. The nut bearing on its seat 10 provides a pivotal mounting for the jaw and in this connection it will be noted that the partition wall 8 extends only partially across the carrier thereby unobstructing the jaw shank in its pivotal movements.

The spring 13 is a very important part of the invention since it yieldingly holds the slidable jaw in gripping position. This spring is substantially L-shaped, having one arm secured to the free end of shank 7 by screw 14 and formed with side ears or flanges 15 straddling the shank and embracing the same to hold the spring against lateral turning. The longerarm of the spring extends inwardly toward the carrier in sliding engagement with the handle, said arm being transversely concaved to conform to the handle and aid in holding the arm thereon. It is to be noted that by reasonof the inturning of the spring sufficient pressure is exerted on the handle to hold the cam end in normal engagement with the inner jaw'without lifting the same from its seat on the forward end of the carrierframe.

The construction is exceedingly simple and is fabricated from few parts thereby rendering the production very economical,

and that by the reason of the rapid or quick adjustment of the slidable jaw together with the tightening movement of the inner jaw when pressure is applied on the handle a thoroughly reliable and practical tool is provided.

What is claimed is:

1. A wrench comprising a carrier frame carrying a jaw, a handle connected therewith, a cooperating movable jaw having a shank slidable through the frame, a spring secured to the end face of the shank and having one end portion deflected and bearing on the handle, and means for adjusting the movable jaw.

2. A wrench comprising a hollow carrier frame, an adjustable jaw having a shank slidable therethrough, a cooperating jaw seating on the-carrier frame opposite the adjustable jaw and formed with a reduced web depending between and pivoted to the side walls. of the carrier frame, said web formed with a concaved cam face forwardly of the pivotal mounting, and a handle also pivoted between the walls of the carrier frame and beneath the web and formed on its inner end with a convexed cam face seating in the cam face of the web and designed vjaw, a handle for to ride therein for moving the second jaw about its pivotal mounting.

8. 'A wrench comprising a carrier frame, an inner j aw, a sliding jaw having its shank extending through the frame, means on the protruding shank to freely engage the frame to prevent opening movement of the slidable the frame, and" a spring secured to the shank and frictionally hearing on the handle for holding the slidable jaw from closing. i

4:. A wrench comprising a carrier frame, a pivoted inner jaw, a slidlng jaw having its shank extending through the frame, ,a handle pivoted in the frame to actuate the inner jaw, and an L-shaped spring secured to the protruding end of the shank and slidably engaging the handle.

In testimony whereof I aflix mIy si nature.

HORACE L. 1) cKsoN. 

